absorpsjon + -s- + koeffisient, first part from Latin absorptiō (“drink, beverage”), from absorbeō (“absorb”), from both ab- (“from, away from, off”), from ab (“from, away from, on, in”), from Proto-Italic *ab, from Proto-Indo-European *h₂epó (“off, away”), + and from sorbeō (“I suck in, drink up”), from Proto-Italic *sorβeō (“to suck in”), from Proto-Indo-European *srobʰéyeti (“to be sipping, sucking”), from *srebʰ- (“to sip, gulp, suck (in)”) and *-éyeti, from *-yeti (creates transitive imperfective verbs).
Last part from Latin coefficiēns (“coefficient”), from coefficio, from both co-, from con-, from cum (“(along) with, at”), from Old Latin com, from Proto-Italic *kom (“with, along, at”), from Proto-Indo-European *ḱóm (“next to, at, with, along”), perhaps from *ḱe (deictic particle) + and from efficio (“I make, work out, effect”), from both ex- (“out, away”), from ē, ex (“out, from”), from Proto-Indo-European *h₁eǵʰs (“out”) + and from faciō (“I do, make”), from Proto-Italic *fakjō (“to make”), from earlier *θakjō, from Proto-Indo-European *dʰh₁k-yé-ti, from *dʰeh₁- (“to do, put, place”).
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absorpsjonskoeffisient m (definite singular absorpsjonskoeffisienten, indefinite plural absorpsjonskoeffisienter, definite plural absorpsjonskoeffisientene)